/// <reference path="Scripts/jquery.d.ts" />
import V = require("VCL/VCL");
import VXC = require("VCL/VXComponent");
import VXU = require("VCL/VXUtils");
import VXI = require("VCL/VXInputBase");
import VXD = require("VCL/VXDataset");

export class TDateInputBase extends VXI.TEditorBase {
    private _dateformat: string;
    public get DateFormat(): string {
        return this._dateformat;
    }
    public set DateFormat(val: string) {
        if (val != this._dateformat) {
            this._dateformat = val;
            this.drawDelayed(true);
        }
    }

    private _calendartype: V.CalendarType = V.CalendarType.Daily;
    public get CalendarType(): V.CalendarType {
        return this._calendartype;
    }
    public set CalendarType(val: V.CalendarType) {
        if (val != this._calendartype) {
            this._calendartype = val;
            this.drawDelayed(true);
        }
    }


    private autoclose: boolean = true;
    public get AutoClose(): boolean {
        return this.autoclose;
    }
    public set AutoClose(val: boolean) {
        if (val != this.autoclose) {
            this.autoclose = val;
            this.draw(true);
        }
    }

    public jButton: JQuery;
    private jImage: JQuery;
    public create() {
        this.jComponent.empty();
        this.jComponent = VXU.VXUtils.changeJComponentType(this.jComponent, 'div', this.FitToWidth, this.FitToHeight);
        this.jComponent.addClass('input-append control-group date');

        this.jEdit = $('<input/>')
        this.jEdit.attr('type', 'text');
        this.jEdit.appendTo(this.jComponent);
        this.jEdit.attr('id', V.Application.genGUID());

        this.jButton = $('<span />')
        this.jButton.addClass('add-on');
        this.jButton.appendTo(this.jComponent);

        this.jImage = $('<i/>')
        this.jImage.addClass('icon-calendar');
        this.jImage.appendTo(this.jButton);


        if (!this.Enabled) {
            this.jImage.attr("disabled", "readonly");
            this.jEdit.attr("disabled", "disabled");
            this.jButton.attr("disabled", "disabled");
        }
        var df = this.DateFormat == null ? V.Application.DateFormat : this.DateFormat;
        this.jComponent.datepicker({ format: df, autoclose: this.AutoClose, minViewMode: this.CalendarType == V.CalendarType.Daily ? 0 : 1 });
        //.on('changeDate', function (ev) {
        //    this.Date = ev.data; //change 0.95
        //});

        super.create();
    }

    public setEditorWidth() {
        this.jEdit.width(this.jComponent.width() - this.jButton.width() - this.jButton.outerWidth());
    }
}

export class TDateInput extends TDateInputBase {
    private _date: Date = new Date();
    public get Date(): Date {
        return this._date;
    }
    public set Date(val: Date) {
        if (val != this._date) {
            this._date = val;
            this.drawDelayed(false);
        }
    }

    public create() {
        super.create();
        var self = this;
        this.jComponent.on('changeDate', function (ev: any) {
            var dt: any = ev.date;
            self.Date = new Date(dt.getTime() + (dt.getTimezoneOffset() * 60000));
            if (this.onChanged != null) (V.tryAndCatch(() => { self.onChanged(self); }))
        });
    }


    public draw(reCreate: boolean) {
        if (!this.parentInitialized()) return;
        super.draw(reCreate);

        this.jComponent.datepicker("setDate", this.Date);
        this.setEditorWidth();
    }
}

export class TDBDateInput extends TDateInputBase {

    public get Date(): Date {
        return this.DateValue;
    }
    public set Date(val: Date) {
        if (val != this.DateValue) {
            this.DateValue = val;
            this.drawDelayed(false);
        }
    }

    private _datafield: string;
    /**
    * Specifies the field from which the edit control displays data.
    */
    public get DataField(): string {
        return this._datafield;
    }
    public set DataField(val: string) {
        if (val != this._datafield) {
            this._datafield = val.toUpperCase();
        }
    }

    private get DateValue(): Date {
        if (this.Dataset == null || this.Dataset.Active == false || this.Dataset.RecordCount <= 0) return null;
        if (this.DataField == null || this.DataField.toString() == "") return null;

        return this.Dataset.getFieldValue(this._datafield);
    }
    private set DateValue(val: Date) {
        if (this.Dataset == null || this.Dataset.Active == false) return;
        if (this.DataField == null || this.DataField.toString() == "") return;

        this.Dataset.setFieldValue(this.DataField.toString(), val);
        this.draw(false);
    }



    private _dataset: VXD.TDataset;
    /*
      * Specifies the dataset that contains the field it represents.
      */
    public get Dataset(): VXD.TDataset {
        return this._dataset;
    }
    public set Dataset(val: VXD.TDataset) {
        if (val != this._dataset) {
            if (this._dataset != null) {
                (<any>this._dataset).removeEventListener(VXD.TDataset.EVENT_DATA_CHANGED, this);
                (<any>this._dataset).removeEventListener(VXD.TDataset.EVENT_SELECTION_CHANGED, this);
                (<any>this._dataset).removeEventListener(VXD.TDataset.EVENT_STATE_CHANGED, this);
            }
            this._dataset = val;
            if (this._dataset != null) {
                (<any>this._dataset).registerEventListener(VXD.TDataset.EVENT_DATA_CHANGED, this, () => { this.draw(false); });
                (<any>this._dataset).registerEventListener(VXD.TDataset.EVENT_SELECTION_CHANGED, this, () => { this.draw(false); });
                (<any>this._dataset).registerEventListener(VXD.TDataset.EVENT_STATE_CHANGED, this, () => { this.validateEnabled(); });
            }

        }
    }

    private validateEnabled() {
        if (this.Dataset == null) this.Enabled = false;
        else if (this.Dataset.Readonly) this.Enabled = false;
        else this.Enabled = this.Dataset.Active;
    }

    public draw(reCreate: boolean) {
        if (!this.parentInitialized()) return;

        if (reCreate || !this.initialized) {
            this.validateEnabled();
            super.draw(reCreate);
        }
        this.jComponent.datepicker("setDate", this.Date);
        this.setEditorWidth();
    }

    public create() {
        super.create();
        var self = this;
        this.jComponent.on('changeDate', function (ev: any) {
            var dt: any = ev.date;
            this.DateValue = new Date(dt.getTime() + (dt.getTimezoneOffset() * 60000));
            if (this.onChanged != null) (V.tryAndCatch(() => { this.onChanged(self); }))
        });
    }
}


function UTCDate(...numbers: number[]) {
    return new Date(Date.UTC.apply(Date, numbers));
}
function UTCToday() {
    var today = new Date();
    return UTCDate(today.getUTCFullYear(), today.getUTCMonth(), today.getUTCDate());
}

// Picker object

var Datepicker = function (element, options) {
    var that = this;

    this.element = $(element);
    this.language = options.language || this.element.data('date-language') || "en";
    this.language = this.language in dates ? this.language : this.language.split('-')[0]; //Check if "de-DE" style date is available, if not language should fallback to 2 letter code eg "de"
    this.language = this.language in dates ? this.language : "en";
    this.isRTL = dates[this.language].rtl || false;
    this.format = DPGlobal.parseFormat(options.format || this.element.data('date-format') || dates[this.language].format || 'mm/dd/yyyy');
    this.isInline = false;
    this.isInput = this.element.is('input');
    this.component = this.element.is('.date') ? this.element.find('.add-on, .btn') : false;
    this.hasInput = this.component && this.element.find('input').length;
    if (this.component && this.component.length === 0)
        this.component = false;

    this._attachEvents();

    this.forceParse = true;
    if ('forceParse' in options) {
        this.forceParse = options.forceParse;
    } else if ('dateForceParse' in this.element.data()) {
        this.forceParse = this.element.data('date-force-parse');
    }


    this.picker = $(DPGlobal.template)
        .appendTo(this.isInline ? this.element : 'body')
        .on({
            click: $.proxy(this.click, this),
            mousedown: $.proxy(this.mousedown, this)
        });

    if (this.isInline) {
        this.picker.addClass('datepicker-inline');
    } else {
        this.picker.addClass('datepicker-dropdown dropdown-menu');
    }
    if (this.isRTL) {
        this.picker.addClass('datepicker-rtl');
        this.picker.find('.prev i, .next i')
            .toggleClass('icon-arrow-left icon-arrow-right');
    }
    $(document).on('mousedown', function (e) {
        // Clicked outside the datepicker, hide it
        if ($(e.target).closest('.datepicker.datepicker-inline, .datepicker.datepicker-dropdown').length === 0) {
            that.hide();
        }
    });

    this.autoclose = false;
    if ('autoclose' in options) {
        this.autoclose = options.autoclose;
    } else if ('dateAutoclose' in this.element.data()) {
        this.autoclose = this.element.data('date-autoclose');
    }

    this.keyboardNavigation = true;
    if ('keyboardNavigation' in options) {
        this.keyboardNavigation = options.keyboardNavigation;
    } else if ('dateKeyboardNavigation' in this.element.data()) {
        this.keyboardNavigation = this.element.data('date-keyboard-navigation');
    }

    this.viewMode = this.startViewMode = 0;
    switch (options.startView || this.element.data('date-start-view')) {
        case 2:
        case 'decade':
            this.viewMode = this.startViewMode = 2;
            break;
        case 1:
        case 'year':
            this.viewMode = this.startViewMode = 1;
            break;
    }

    this.minViewMode = options.minViewMode || this.element.data('date-min-view-mode') || 0;
    if (typeof this.minViewMode === 'string') {
        switch (this.minViewMode) {
            case 'months':
                this.minViewMode = 1;
                break;
            case 'years':
                this.minViewMode = 2;
                break;
            default:
                this.minViewMode = 0;
                break;
        }
    }

    this.viewMode = this.startViewMode = Math.max(this.startViewMode, this.minViewMode);

    this.todayBtn = (options.todayBtn || this.element.data('date-today-btn') || false);
    this.todayHighlight = (options.todayHighlight || this.element.data('date-today-highlight') || false);

    this.calendarWeeks = false;
    if ('calendarWeeks' in options) {
        this.calendarWeeks = options.calendarWeeks;
    } else if ('dateCalendarWeeks' in this.element.data()) {
        this.calendarWeeks = this.element.data('date-calendar-weeks');
    }
    if (this.calendarWeeks)
        this.picker.find('tfoot th.today')
            .attr('colspan', function (i, val) {
                return parseInt(val) + 1;
            });

    this.weekStart = ((options.weekStart || this.element.data('date-weekstart') || dates[this.language].weekStart || 0) % 7);
    this.weekEnd = ((this.weekStart + 6) % 7);
    this.startDate = -Infinity;
    this.endDate = Infinity;
    this.daysOfWeekDisabled = [];
    this.setStartDate(options.startDate || this.element.data('date-startdate'));
    this.setEndDate(options.endDate || this.element.data('date-enddate'));
    this.setDaysOfWeekDisabled(options.daysOfWeekDisabled || this.element.data('date-days-of-week-disabled'));
    this.fillDow();
    this.fillMonths();
    this.update();
    this.showMode();

    if (this.isInline) {
        this.show();
    }
};

Datepicker.prototype = {
    constructor: Datepicker,

    _events: [],
    _attachEvents: function () {
        this._detachEvents();
        if (this.isInput) { // single input
            this._events = [
                [this.element, {
                    focus: $.proxy(this.show, this),
                    keyup: $.proxy(this.update, this),
                    keydown: $.proxy(this.keydown, this)
                }]
            ];
        }
        else if (this.component && this.hasInput) { // component: input + button
            this._events = [
                // For components that are not readonly, allow keyboard nav
                [this.element.find('input'), {
                    focus: $.proxy(this.show, this),
                    keyup: $.proxy(this.update, this),
                    keydown: $.proxy(this.keydown, this)
                }],
                [this.component, {
                    click: $.proxy(this.show, this)
                }]
            ];
        }
        else if (this.element.is('div')) {  // inline datepicker
            this.isInline = true;
        }
        else {
            this._events = [
                [this.element, {
                    click: $.proxy(this.show, this)
                }]
            ];
        }
        for (var i = 0, el, ev; i < this._events.length; i++) {
            el = this._events[i][0];
            ev = this._events[i][1];
            el.on(ev);
        }
    },
    _detachEvents: function () {
        for (var i = 0, el, ev; i < this._events.length; i++) {
            el = this._events[i][0];
            ev = this._events[i][1];
            el.off(ev);
        }
        this._events = [];
    },

    show: function (e) {
        if ($(e.target).attr("disabled")) return;
        this.picker.show();
        this.height = this.component ? this.component.outerHeight() : this.element.outerHeight();
        this.update();
        this.place();
        $(window).on('resize', $.proxy(this.place, this));
        if (e) {
            e.preventDefault();
        }
        this.element.trigger({
            type: 'show',
            date: this.date
        });
    },

    hide: function (e) {
        if (this.isInline) return;
        if (!this.picker.is(':visible')) return;
        this.picker.hide();
        $(window).off('resize', this.place);
        this.viewMode = this.startViewMode;
        this.showMode();
        if (!this.isInput) {
            $(document).off('mousedown', this.hide);
        }

        if (
            this.forceParse &&
            (
            this.isInput && this.element.val() ||
            this.hasInput && this.element.find('input').val()
            )
            )
            this.setValue();
        this.element.trigger({
            type: 'hide',
            date: this.date
        });
    },

    remove: function () {
        this._detachEvents();
        this.picker.remove();
        delete this.element.data().datepicker;
        if (!this.isInput) {
            delete this.element.data().date;
        }
    },

    getDate: function () {
        var d = this.getUTCDate();
        return new Date(d.getTime() + (d.getTimezoneOffset() * 60000));
    },

    getUTCDate: function () {
        return this.date;
    },

    setDate: function (d) {
        this.setUTCDate(new Date(d.getTime() - (d.getTimezoneOffset() * 60000)));
    },

    setUTCDate: function (d) {
        this.date = d;
        this.setValue();
    },

    setValue: function () {
        var formatted = this.getFormattedDate();
        if (!this.isInput) {
            if (this.component) {
                this.element.find('input').val(formatted);
            }
            this.element.data('date', formatted);
        } else {
            this.element.val(formatted);
        }
    },

    getFormattedDate: function (format) {
        if (format === undefined) format = this.format;
        return DPGlobal.formatDate(this.date, format, this.language);
    },

    setStartDate: function (startDate) {
        this.startDate = startDate || -Infinity;
        if (this.startDate !== -Infinity) {
            this.startDate = DPGlobal.parseDate(this.startDate, this.format, this.language);
        }
        this.update();
        this.updateNavArrows();
    },

    setEndDate: function (endDate) {
        this.endDate = endDate || Infinity;
        if (this.endDate !== Infinity) {
            this.endDate = DPGlobal.parseDate(this.endDate, this.format, this.language);
        }
        this.update();
        this.updateNavArrows();
    },

    setDaysOfWeekDisabled: function (daysOfWeekDisabled) {
        this.daysOfWeekDisabled = daysOfWeekDisabled || [];
        if (!$.isArray(this.daysOfWeekDisabled)) {
            this.daysOfWeekDisabled = this.daysOfWeekDisabled.split(/,\s*/);
        }
        this.daysOfWeekDisabled = $.map(this.daysOfWeekDisabled, function (d) {
            return parseInt(d, 10);
        });
        this.update();
        this.updateNavArrows();
    },

    place: function () {
        if (this.isInline) return;
        var zIndex = parseInt(this.element.parents().filter(function () {
            return $(this).css('z-index') != 'auto';
        }).first().css('z-index')) + 10;
        var parentOffset = this.component ? this.component.parent().offset() : this.element.offset();
        var offset = this.component ? this.component.offset() : this.element.offset();
        var height = this.component ? this.component.outerHeight(true) : this.element.outerHeight(true);
        this.picker.css({
            top: offset.top + height,
            left: parentOffset.left,
            zIndex: zIndex
        });
    },

    update: function () {
        var date, fromArgs = false;
        if (arguments && arguments.length && (typeof arguments[0] === 'string' || arguments[0] instanceof Date)) {
            date = arguments[0];
            fromArgs = true;
        } else {
            date = this.isInput ? this.element.val() : this.element.data('date') || this.element.find('input').val();
        }

        this.date = DPGlobal.parseDate(date, this.format, this.language);

        if (fromArgs) this.setValue();

        if (this.date < this.startDate) {
            this.viewDate = new Date(this.startDate);
        } else if (this.date > this.endDate) {
            this.viewDate = new Date(this.endDate);
        } else {
            this.viewDate = new Date(this.date);
        }
        this.fill();
    },

    fillDow: function () {
        var dowCnt = this.weekStart,
            html = '<tr>';
        if (this.calendarWeeks) {
            var cell = '<th class="cw">&nbsp;</th>';
            html += cell;
            this.picker.find('.datepicker-days thead tr:first-child').prepend(cell);
        }
        while (dowCnt < this.weekStart + 7) {
            html += '<th class="dow">' + dates[this.language].daysMin[(dowCnt++) % 7] + '</th>';
        }
        html += '</tr>';
        this.picker.find('.datepicker-days thead').append(html);
    },

    fillMonths: function () {
        var html: string = '';
        var i: number = 0;
        while (i < 12) {
            html += '<span class="month">' + dates[this.language].monthsShort[i++] + '</span>';
        }
        this.picker.find('.datepicker-months td').html(html);
    },

    fill: function () {
        var d = new Date(this.viewDate),
            year = d.getUTCFullYear(),
            month = d.getUTCMonth(),
            startYear = this.startDate !== -Infinity ? this.startDate.getUTCFullYear() : -Infinity,
            startMonth = this.startDate !== -Infinity ? this.startDate.getUTCMonth() : -Infinity,
            endYear = this.endDate !== Infinity ? this.endDate.getUTCFullYear() : Infinity,
            endMonth = this.endDate !== Infinity ? this.endDate.getUTCMonth() : Infinity,
            currentDate = this.date && this.date.valueOf(),
            today = new Date();
        this.picker.find('.datepicker-days thead th.switch')
            .text(dates[this.language].months[month] + ' ' + year);
        this.picker.find('tfoot th.today')
            .text(dates[this.language].today)
            .toggle(this.todayBtn !== false);
        this.updateNavArrows();
        this.fillMonths();
        var prevMonth = UTCDate(year, month - 1, 28, 0, 0, 0, 0);
        var day = DPGlobal.getDaysInMonth(prevMonth.getUTCFullYear(), prevMonth.getUTCMonth());
        prevMonth.setUTCDate(day);
        prevMonth.setUTCDate(day - (prevMonth.getUTCDay() - this.weekStart + 7) % 7);
        var nextMonth = new Date(prevMonth.toString());
        nextMonth.setUTCDate(nextMonth.getUTCDate() + 42);
        var html = [];
        var clsName;
        while (prevMonth.valueOf() < nextMonth.valueOf()) {
            if (prevMonth.getUTCDay() == this.weekStart) {
                html.push('<tr>');
                if (this.calendarWeeks) {
                    // ISO 8601: First week contains first thursday.
                    // ISO also states week starts on Monday, but we can be more abstract here.

                    // Start of current week: based on weekstart/current date
                    var ws = new Date(+prevMonth + (this.weekStart - prevMonth.getUTCDay() - 7) % 7 * 864e5);
                    // Thursday of this week
                    var th: any = new Date(+ws + (7 + 4 - ws.getUTCDay()) % 7 * 864e5);
                    // First Thursday of year, year from thursday
                    var yth: any = new Date(+(yth = UTCDate(th.getUTCFullYear(), 0, 1)) + (7 + 4 - yth.getUTCDay()) % 7 * 864e5);
                    // Calendar week: ms between thursdays, div ms per day, div 7 days
                    var calWeek: number = (th - yth) / 864e5 / 7 + 1;
                    html.push('<td class="cw">' + calWeek + '</td>');
                }
            }
            clsName = '';
            if (prevMonth.getUTCFullYear() < year || (prevMonth.getUTCFullYear() == year && prevMonth.getUTCMonth() < month)) {
                clsName += ' old';
            } else if (prevMonth.getUTCFullYear() > year || (prevMonth.getUTCFullYear() == year && prevMonth.getUTCMonth() > month)) {
                clsName += ' new';
            }
            // Compare internal UTC date with local today, not UTC today
            if (this.todayHighlight &&
                prevMonth.getUTCFullYear() == today.getFullYear() &&
                prevMonth.getUTCMonth() == today.getMonth() &&
                prevMonth.getUTCDate() == today.getDate()) {
                clsName += ' today';
            }
            if (currentDate && prevMonth.valueOf() == currentDate) {
                clsName += ' active';
            }
            if (prevMonth.valueOf() < this.startDate || prevMonth.valueOf() > this.endDate ||
                $.inArray(prevMonth.getUTCDay(), this.daysOfWeekDisabled) !== -1) {
                clsName += ' disabled';
            }
            html.push('<td class="day' + clsName + '">' + prevMonth.getUTCDate() + '</td>');
            if (prevMonth.getUTCDay() == this.weekEnd) {
                html.push('</tr>');
            }
            prevMonth.setUTCDate(prevMonth.getUTCDate() + 1);
        }
        this.picker.find('.datepicker-days tbody').empty().append(html.join(''));
        var currentYear = this.date && this.date.getUTCFullYear();

        var months = this.picker.find('.datepicker-months')
            .find('th:eq(1)')
            .text(year)
            .end()
            .find('span').removeClass('active');
        if (currentYear && currentYear == year) {
            months.eq(this.date.getUTCMonth()).addClass('active');
        }
        if (year < startYear || year > endYear) {
            months.addClass('disabled');
        }
        if (year == startYear) {
            months.slice(0, startMonth).addClass('disabled');
        }
        if (year == endYear) {
            months.slice(endMonth + 1).addClass('disabled');
        }

        var html2 = '';
        year = parseInt((year / 10).toString(), 10) * 10;
        var yearCont = this.picker.find('.datepicker-years')
            .find('th:eq(1)')
            .text(year + '-' + (year + 9))
            .end()
            .find('td');
        year -= 1;
        for (var i = -1; i < 11; i++) {
            html2 += '<span class="year' + (i == -1 || i == 10 ? ' old' : '') + (currentYear == year ? ' active' : '') + (year < startYear || year > endYear ? ' disabled' : '') + '">' + year + '</span>';
            year += 1;
        }
        yearCont.html(html);
    },

    updateNavArrows: function () {
        var d = new Date(this.viewDate),
            year = d.getUTCFullYear(),
            month = d.getUTCMonth();
        switch (this.viewMode) {
            case 0:
                if (this.startDate !== -Infinity && year <= this.startDate.getUTCFullYear() && month <= this.startDate.getUTCMonth()) {
                    this.picker.find('.prev').css({ visibility: 'hidden' });
                } else {
                    this.picker.find('.prev').css({ visibility: 'visible' });
                }
                if (this.endDate !== Infinity && year >= this.endDate.getUTCFullYear() && month >= this.endDate.getUTCMonth()) {
                    this.picker.find('.next').css({ visibility: 'hidden' });
                } else {
                    this.picker.find('.next').css({ visibility: 'visible' });
                }
                break;
            case 1:
            case 2:
                if (this.startDate !== -Infinity && year <= this.startDate.getUTCFullYear()) {
                    this.picker.find('.prev').css({ visibility: 'hidden' });
                } else {
                    this.picker.find('.prev').css({ visibility: 'visible' });
                }
                if (this.endDate !== Infinity && year >= this.endDate.getUTCFullYear()) {
                    this.picker.find('.next').css({ visibility: 'hidden' });
                } else {
                    this.picker.find('.next').css({ visibility: 'visible' });
                }
                break;
        }
    },

    click: function (e) {
        e.preventDefault();
        var target = $(e.target).closest('span, td, th');
        if (target.length == 1) {
            switch (target[0].nodeName.toLowerCase()) {
                case 'th':
                    switch (target[0].className) {
                        case 'switch':
                            this.showMode(1);
                            break;
                        case 'prev':
                        case 'next':
                            var dir = DPGlobal.modes[this.viewMode].navStep * (target[0].className == 'prev' ? -1 : 1);
                            switch (this.viewMode) {
                                case 0:
                                    this.viewDate = this.moveMonth(this.viewDate, dir);
                                    break;
                                case 1:
                                case 2:
                                    this.viewDate = this.moveYear(this.viewDate, dir);
                                    break;
                            }
                            this.fill();
                            break;
                        case 'today':
                            var date = new Date();
                            date = UTCDate(date.getFullYear(), date.getMonth(), date.getDate(), 0, 0, 0);

                            this.showMode(-2);
                            var which = this.todayBtn == 'linked' ? null : 'view';
                            this._setDate(date, which);
                            break;
                    }
                    break;
                case 'span':
                    if (!target.is('.disabled')) {
                        this.viewDate.setUTCDate(1);
                        if (target.is('.month')) {
                            var day = 1;
                            var month = target.parent().find('span').index(target);
                            var year = this.viewDate.getUTCFullYear();
                            this.viewDate.setUTCMonth(month);
                            this.element.trigger({
                                type: 'changeMonth',
                                date: this.viewDate
                            });
                            if (this.minViewMode == 1) {
                                this._setDate(UTCDate(year, month, day, 0, 0, 0, 0));
                            }
                        } else {
                            var year2 = parseInt(target.text(), 10) || 0;
                            var day = 1;
                            var _month = 0;
                            this.viewDate.setUTCFullYear(year2);
                            this.element.trigger({
                                type: 'changeYear',
                                date: this.viewDate
                            });
                            if (this.minViewMode == 2) {
                                this._setDate(UTCDate(year, _month, day, 0, 0, 0, 0));
                            }
                        }
                        this.showMode(-1);
                        this.fill();
                    }
                    break;
                case 'td':
                    if (target.is('.day') && !target.is('.disabled')) {
                        var day = parseInt(target.text(), 10) || 1;
                        var year = this.viewDate.getUTCFullYear();
                        var month: number = this.viewDate.getUTCMonth();
                        if (target.is('.old')) {
                            if (month === 0) {
                                month = 11;
                                year -= 1;
                            } else {
                                month -= 1;
                            }
                        } else if (target.is('.new')) {
                            if (month == 11) {
                                month = 0;
                                year += 1;
                            } else {
                                month += 1;
                            }
                        }
                        this._setDate(UTCDate(year, month, day, 0, 0, 0, 0));
                    }
                    break;
            }
        }
    },

    _setDate: function (date, which) {
        if (!which || which == 'date')
            this.date = date;
        if (!which || which == 'view')
            this.viewDate = date;
        this.fill();
        this.setValue();
        this.element.trigger({
            type: 'changeDate',
            date: this.date
        });
        var element;
        if (this.isInput) {
            element = this.element;
        } else if (this.component) {
            element = this.element.find('input');
        }
        if (element) {
            element.change();
            if (this.autoclose && (!which || which == 'date')) {
                this.hide();
            }
        }
    },

    moveMonth: function (date, dir) {
        if (!dir) return date;
        var new_date = new Date(date.valueOf()),
            day = new_date.getUTCDate(),
            month = new_date.getUTCMonth(),
            mag = Math.abs(dir),
            new_month, test;
        dir = dir > 0 ? 1 : -1;
        if (mag == 1) {
            test = dir == -1
            // If going back one month, make sure month is not current month
            // (eg, Mar 31 -> Feb 31 == Feb 28, not Mar 02)
            ? function () { return new_date.getUTCMonth() == month; }
            // If going forward one month, make sure month is as expected
            // (eg, Jan 31 -> Feb 31 == Feb 28, not Mar 02)
            : function () { return new_date.getUTCMonth() != new_month; };
            new_month = month + dir;
            new_date.setUTCMonth(new_month);
            // Dec -> Jan (12) or Jan -> Dec (-1) -- limit expected date to 0-11
            if (new_month < 0 || new_month > 11)
                new_month = (new_month + 12) % 12;
        } else {
            // For magnitudes >1, move one month at a time...
            for (var i = 0; i < mag; i++)
                // ...which might decrease the day (eg, Jan 31 to Feb 28, etc)...
                new_date = this.moveMonth(new_date, dir);
            // ...then reset the day, keeping it in the new month
            new_month = new_date.getUTCMonth();
            new_date.setUTCDate(day);
            test = function () { return new_month != new_date.getUTCMonth(); };
        }
        // Common date-resetting loop -- if date is beyond end of month, make it
        // end of month
        while (test()) {
            new_date.setUTCDate(--day);
            new_date.setUTCMonth(new_month);
        }
        return new_date;
    },

    moveYear: function (date, dir) {
        return this.moveMonth(date, dir * 12);
    },

    dateWithinRange: function (date) {
        return date >= this.startDate && date <= this.endDate;
    },

    keydown: function (e) {
        if (this.picker.is(':not(:visible)')) {
            if (e.keyCode == 27) // allow escape to hide and re-show picker
                this.show();
            return;
        }
        var dateChanged = false,
            dir, day, month,
            newDate, newViewDate;
        switch (e.keyCode) {
            case 27: // escape
                this.hide();
                e.preventDefault();
                break;
            case 37: // left
            case 39: // right
                if (!this.keyboardNavigation) break;
                dir = e.keyCode == 37 ? -1 : 1;
                if (e.ctrlKey) {
                    newDate = this.moveYear(this.date, dir);
                    newViewDate = this.moveYear(this.viewDate, dir);
                } else if (e.shiftKey) {
                    newDate = this.moveMonth(this.date, dir);
                    newViewDate = this.moveMonth(this.viewDate, dir);
                } else {
                    newDate = new Date(this.date);
                    newDate.setUTCDate(this.date.getUTCDate() + dir);
                    newViewDate = new Date(this.viewDate);
                    newViewDate.setUTCDate(this.viewDate.getUTCDate() + dir);
                }
                if (this.dateWithinRange(newDate)) {
                    this.date = newDate;
                    this.viewDate = newViewDate;
                    this.setValue();
                    this.update();
                    e.preventDefault();
                    dateChanged = true;
                }
                break;
            case 38: // up
            case 40: // down
                if (!this.keyboardNavigation) break;
                dir = e.keyCode == 38 ? -1 : 1;
                if (e.ctrlKey) {
                    newDate = this.moveYear(this.date, dir);
                    newViewDate = this.moveYear(this.viewDate, dir);
                } else if (e.shiftKey) {
                    newDate = this.moveMonth(this.date, dir);
                    newViewDate = this.moveMonth(this.viewDate, dir);
                } else {
                    newDate = new Date(this.date);
                    newDate.setUTCDate(this.date.getUTCDate() + dir * 7);
                    newViewDate = new Date(this.viewDate);
                    newViewDate.setUTCDate(this.viewDate.getUTCDate() + dir * 7);
                }
                if (this.dateWithinRange(newDate)) {
                    this.date = newDate;
                    this.viewDate = newViewDate;
                    this.setValue();
                    this.update();
                    e.preventDefault();
                    dateChanged = true;
                }
                break;
            case 13: // enter
                this.hide();
                e.preventDefault();
                break;
            case 9: // tab
                this.hide();
                break;
        }
        if (dateChanged) {
            this.element.trigger({
                type: 'changeDate',
                date: this.date
            });
            var element;
            if (this.isInput) {
                element = this.element;
            } else if (this.component) {
                element = this.element.find('input');
            }
            if (element) {
                element.change();
            }
        }
    },

    showMode: function (dir) {
        if (dir) {
            this.viewMode = Math.max(this.minViewMode, Math.min(2, this.viewMode + dir));
        }
        /*
            vitalets: fixing bug of very special conditions:
            jquery 1.7.1 + webkit + show inline datepicker in bootstrap popover.
            Method show() does not set display css correctly and datepicker is not shown.
            Changed to .css('display', 'block') solve the problem.
            See https://github.com/vitalets/x-editable/issues/37

            In jquery 1.7.2+ everything works fine.
        */
        this.picker.find('>div').hide().filter('.datepicker-' + DPGlobal.modes[this.viewMode].clsName).css('display', 'block');
        this.updateNavArrows();
    }
};

$.fn.datepicker = function (option) {
    var args = Array.apply(null, arguments);
    args.shift();
    return this.each(function () {
        var $this = $(this),
            data = $this.data('datepicker'),
            options = typeof option == 'object' && option;
        if (!data) {
            $this.data('datepicker', (data = new Datepicker(this, $.extend({}, $.fn.datepicker.defaults, options))));
        }
        if (typeof option == 'string' && typeof data[option] == 'function') {
            data[option].apply(data, args);
        }
    });
};

var dates = $.fn.datepicker.dates = {
    en: {
        days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"],
        daysShort: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"],
        daysMin: ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"],
        months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
        monthsShort: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
        today: "Today"
    }
};

var DPGlobal: any = {
    modes: [
        {
            clsName: 'days',
            navFnc: 'Month',
            navStep: 1
        },
        {
            clsName: 'months',
            navFnc: 'FullYear',
            navStep: 1
        },
        {
            clsName: 'years',
            navFnc: 'FullYear',
            navStep: 10
        }],
    isLeapYear: function (year) {
        return (((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0));
    },
    getDaysInMonth: function (year, month) {
        return [31, (DPGlobal.isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];
    },
    validParts: /dd?|DD?|mm?|MM?|yy(?:yy)?/g,
    nonpunctuation: /[^ -\/:-@\[\u3400-\u9fff-`{-~\t\n\r]+/g,
    parseFormat: function (format) {
        // IE treats \0 as a string end in inputs (truncating the value),
        // so it's a bad format delimiter, anyway
        var separators = format.replace(this.validParts, '\0').split('\0'),
            parts = format.match(this.validParts);
        if (!separators || !separators.length || !parts || parts.length === 0) {
            throw new Error("Invalid date format.");
        }
        return { separators: separators, parts: parts };
    },
    parseDate: function (date, format, language) {
        if (date instanceof Date) return date;
        if (/^[\-+]\d+[dmwy]([\s,]+[\-+]\d+[dmwy])*$/.test(date)) {
            var part_re = /([\-+]\d+)([dmwy])/,
                parts = date.match(/([\-+]\d+)([dmwy])/g),
                part, dir;
            date = new Date();
            for (var i = 0; i < parts.length; i++) {
                part = part_re.exec(parts[i]);
                dir = parseInt(part[1]);
                switch (part[2]) {
                    case 'd':
                        date.setUTCDate(date.getUTCDate() + dir);
                        break;
                    case 'm':
                        date = Datepicker.prototype.moveMonth.call(Datepicker.prototype, date, dir);
                        break;
                    case 'w':
                        date.setUTCDate(date.getUTCDate() + dir * 7);
                        break;
                    case 'y':
                        date = Datepicker.prototype.moveYear.call(Datepicker.prototype, date, dir);
                        break;
                }
            }
            return UTCDate(date.getUTCFullYear(), date.getUTCMonth(), date.getUTCDate(), 0, 0, 0);
        }
        var parts = date && date.match(this.nonpunctuation) || [],
            date: any = new Date(),
            parsed = {},
            setters_order = ['yyyy', 'yy', 'M', 'MM', 'm', 'mm', 'd', 'dd'],
            setters_map = {
                yyyy: function (d, v) { return d.setUTCFullYear(v); },
                yy: function (d, v) { return d.setUTCFullYear(2000 + v); },
                m: function (d, v) {
                    v -= 1;
                    while (v < 0) v += 12;
                    v %= 12;
                    d.setUTCMonth(v);
                    while (d.getUTCMonth() != v)
                        d.setUTCDate(d.getUTCDate() - 1);
                    return d;
                },
                d: function (d, v) { return d.setUTCDate(v); }
            },
            val, filtered, part;
        setters_map['M'] = setters_map['MM'] = setters_map['mm'] = setters_map['m'];
        setters_map['dd'] = setters_map['d'];
        date = UTCDate(date.getFullYear(), date.getMonth(), date.getDate(), 0, 0, 0);
        var fparts = format.parts.slice();
        // Remove noop parts
        if (parts.length != fparts.length) {
            fparts = $(fparts).filter(function (i, p) {
                return $.inArray(p, setters_order) !== -1;
            }).toArray();
        }
        // Process remainder
        if (parts.length == fparts.length) {
            for (var i = 0, cnt = fparts.length; i < cnt; i++) {
                val = parseInt(parts[i], 10);
                part = fparts[i];
                if (isNaN(val)) {
                    switch (part) {
                        case 'MM':
                            filtered = $(dates[language].months).filter(function () {
                                var m = this.slice(0, parts[i].length),
                                    p = parts[i].slice(0, m.length);
                                return m == p;
                            });
                            val = $.inArray(filtered[0], dates[language].months) + 1;
                            break;
                        case 'M':
                            filtered = $(dates[language].monthsShort).filter(function () {
                                var m = this.slice(0, parts[i].length),
                                    p = parts[i].slice(0, m.length);
                                return m == p;
                            });
                            val = $.inArray(filtered[0], dates[language].monthsShort) + 1;
                            break;
                    }
                }
                parsed[part] = val;
            }
            for (var i = 0, s; i < setters_order.length; i++) {
                s = setters_order[i];
                if (s in parsed && !isNaN(parsed[s]))
                    setters_map[s](date, parsed[s]);
            }
        }
        return date;
    },
    formatDate: function (date, format, language) {
        var val: any = {
            d: date.getUTCDate(),
            D: dates[language].daysShort[date.getUTCDay()],
            DD: dates[language].days[date.getUTCDay()],
            m: date.getUTCMonth() + 1,
            M: dates[language].monthsShort[date.getUTCMonth()],
            MM: dates[language].months[date.getUTCMonth()],
            yy: date.getUTCFullYear().toString().substring(2),
            yyyy: date.getUTCFullYear()
        };
        val.dd = (val.d < 10 ? '0' : '') + val.d;
        val.mm = (val.m < 10 ? '0' : '') + val.m;
        var date1 = [];
        var seps: any = $.extend([], format.separators);
        for (var i = 0, cnt = format.parts.length; i < cnt; i++) {
            if (seps.length)
                date1.push(seps.shift());
            date1.push(val[format.parts[i]]);
        }
        return date1.join('');
    },
    headTemplate: '<thead>' + '<tr>' + '<th class="prev"><i class="icon-arrow-left"/></th>' + '<th colspan="5" class="switch"></th>' +
    '<th class="next"><i class="icon-arrow-right"/></th>' + '</tr>' + '</thead>',
    contTemplate: '<tbody><tr><td colspan="7"></td></tr></tbody>',
    footTemplate: '<tfoot><tr><th colspan="7" class="today"></th></tr></tfoot>'
};
DPGlobal.template = '<div class="datepicker">' +
'<div class="datepicker-days">' + '<table class=" table-condensed">' + DPGlobal.headTemplate + '<tbody></tbody>'
+ DPGlobal.footTemplate + '</table>' + '</div>' + '<div class="datepicker-months">' + '<table class="table-condensed">' + DPGlobal.headTemplate +
DPGlobal.contTemplate + DPGlobal.footTemplate + '</table>' + '</div>' + '<div class="datepicker-years">' + '<table class="table-condensed">' +
DPGlobal.headTemplate + DPGlobal.contTemplate + DPGlobal.footTemplate + '</table>' + '</div>' + '</div>';


